Saubert did not receive a target in Sunday's blowout win over the Patriots, logging 18 snaps on offense (29 percent) while playing 20 on special teams.
Saubert had two receptions on as many targets for 41 yards in Sunday's 27-24 loss to the Rams.
Saubert finished with two receptions on as many targets for 26 yards in Sunday's 23-17 loss to Minnesota.
Saubert signed to the 49ers' 53-man roster Wednesday, Nick Wagoner of ESPN.com reports.
Saubert has two receptions (three targets) for 11 yards through two preseason games with San Francisco.
Saubert signed a one-year deal with the 49ers on Monday.
Saubert did not suit up for Houston's 34-10 playoff loss to Baltimore last Saturday. He finished the season three receptions on three targets for 12 yards over nine games played.
Saubert played all 25 of his snaps on special teams in the Texans' 19-16 overtime win over the Titans.
Saubert (coach's decision) is inactive ahead of Sunday's game against the Cardinals.
Saubert was not targeted and played 12 snaps in Sunday's 39-37 win over Tampa Bay in Week 9.